chore: add AI policy (#33332)

AI_POLICY.md

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+# AI policy
+
+Project maintainers are responsible for any code that is published as part of a release.
+Contributors are responsible for their contributions, both in terms of communications and code.
+This responsibility is for both understanding of and the quality of their contributions.
+
+## Personal use
+
+You are free to use an AI locally for your own purposes,
+including to answer your questions, analyze, distill, refine, check, suggest, and review.
+
+## Communication
+
+**AI should not be used to generate comments when communicating with maintainers.**
+We expect comments on our projects to be written by humans.
+We may hide or delete any comments where we believe AI generation was involved.
+
+If you are opening an issue,
+we expect you to have personally reproduced the problem and to describe it in your own words.
+
+If you are opening a pull request,
+we expect you to be able to explain the proposed changes in your own words.
+This includes the pull request body and responses to questions.
+**Do not copy responses from an AI when replying to questions from maintainers.**
+Do not run agents or bots on pull requests without first getting approval.
+
+We understand that AI is useful when communicating as a non-native English speaker.
+If you are using AI to edit your comments for this purpose,
+please take the time to ensure it reflects your own voice and ideas.
+If using AI for translation, we recommend writing in your native language and including the AI translation in a [`<details>` block].
+
+If you wish to include context from an interaction with AI in your comments,
+it must be in a [`<details>` block] and disclosed as such.
+The block must include human commentary explaining the relevance and implications of the context.
+The content of your comment must stand on its own even without the quoted content.
+Do not share long snippets.
+
+## Code
+
+Using AI as tools for coding requires receiving permission on the relevant issue before a PR is posted.
+
+This project requires a human in the loop who understands the work produced by AI.
+**We do not allow autonomous agents to be used for contributing to this project**.
+We will close any pull requests that we believe were created **without meaningful involvement** from the contributor.
+Contributions should not "read" as being written by an AI.
+
+Some areas require specific expertise or care when touching.
+AI generated code, even with human review, is prohibited for:
+- none
+
+We view AI as providing a way to improve quality and will hold AI-assisted contributions to a higher standard.
+We will be more free in asking for changes.
+
+The involvement of AI assistance must be disclosed in PRs.
+
+For documentation, including comments in code, see [Communication](#communication).
+
+[`<details>` block]: https://docs.github.com/en/get-started/writing-on-github/working-with-advanced-formatting/organizing-information-with-collapsed-sections)